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TM4C129XNCZAD: UART 0

Sagar patil
Prodigy 70 points

Part Number: TM4C129XNCZAD
Other Parts Discussed in Thread: EK-TM4C1294XL

Tool/software:

Hi, 

I am not able to use UART0. Not receiving data on it. Please suggest if any extra components/ module to be added if any.

  • 0
    TI__Guru**** 191886 points

    Hi,

    Sagar patil said:
    Not receiving data on it.

    Does transmit work? Or both transmit and receive are failing. 

      Please run the example C:\ti\TivaWare_C_Series-2.2.0.295\examples\boards\ek-tm4c1294xl\uart_echo This example will echo everything you type at the terminal, meaning what is typed will be received by the MCU and then the same message being transmitted back to the terminal through UART0. Make sure you have the same baudrate, number of stop bits and no parity on both side. The example uses 11520-1-N. Use a scope or logic analyzer to probe the UART0TX and UART0RX. If you see proper UART0TX waveform but no UART0RX then you need to investigate the other end of the communication. I don't know if your UART0 is talking to the PC or another component with a UART interface. If you are talking to a PC, you need to go through a USB to Serial adapter such as a FTDI chip. 

  • 0 in reply to Charles Tsai
    Prodigy 70 points

    I am connecting a RS422 sensor. if I connect the sensor to any other port, that is UART1 to UART7 it works satisfactorily. Its not working with UART0 only. Is there any settings in code I need to do?

  • 0 in reply to Sagar patil
    TI__Guru**** 191886 points

    Can you show your code how you configure UART0 (not working) vs UART1 (working)?

    Can you show the UART0TX and UART0RX waveforms?

    Can you show the waveforms of the other side of RS422 (the differential TX and RX?

  • 0 in reply to Charles Tsai
    TI__Guru**** 191886 points

    Hi,

      I have not heard back from you. I will close the thread for now. If you have any update you can write to this post again and the status will change to OPEN.